/* roulang page: index */
:root {
            --cosmic-deep: #0A1128;
            --cosmic-blue: #0B0F2A;
            --stellar-gold: #D4AF37;
            --stellar-gold-bright: #F0C45A;
            --ice-cyan: #4CC9F0;
            --cold-cyan: #00E5FF;
            --text-primary: #E0E6ED;
            --text-muted: #8892A4;
            --glass-bg: rgba(255, 255, 255, 0.04);
            --glass-border: rgba(255, 255, 255, 0.1);
            --glass-bg-hover: rgba(255, 255, 255, 0.08);
            --glow-cyan: 0 0 18px rgba(0, 229, 255, 0.35);
            --glow-gold: 0 0 22px rgba(212, 175, 55, 0.45);
            --radius-card: 18px;
            --radius-btn: 10px;
            --radius-input: 10px;
            --transition-smooth: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'PingFang SC', 'Microsoft YaHei', '苹方', 'Inter', 'SF Pro Display', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--cosmic-deep);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        a {
            color: var(--stellar-gold);
            text-decoration: none;
            transition: color var(--transition-smooth);
        }
        a:hover {
            color: var(--stellar-gold-bright);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button, .button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
            transition: all var(--transition-smooth);
            outline: none;
        }

        /* 导航 */
        .nav-container {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 99;
            background: rgba(11, 15, 42, 0.7);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        .nav-container.scrolled {
            background: rgba(10, 17, 40, 0.92);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.6);
        }

        .nav-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            max-width: 1200px;
            margin: 0 auto;
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--stellar-gold-bright), var(--stellar-gold));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: 1px;
            white-space: nowrap;
        }

        .nav-links {
            display: flex;
            gap: 2rem;
            align-items: center;
        }

        .nav-links a {
            color: var(--text-primary);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 4px 0;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--cold-cyan);
            transition: width var(--transition-smooth);
            box-shadow: var(--glow-cyan);
        }

        .nav-links a:hover::after {
            width: 100%;
        }

        .nav-cta {
            background: linear-gradient(135deg, var(--stellar-gold), var(--stellar-gold-bright));
            color: #0A1128 !important;
            padding: 10px 24px;
            border-radius: var(--radius-btn);
            font-weight: 700;
            box-shadow: 0 6px 18px rgba(212, 175, 55, 0.4);
            border: none;
            transition: all var(--transition-smooth);
            display: inline-block;
        }

        .nav-cta:hover {
            transform: scale(1.04);
            box-shadow: 0 10px 28px rgba(240, 196, 90, 0.6);
            color: #0A1128 !important;
        }

        .hamburger {
            display: none;
            font-size: 1.8rem;
            color: var(--text-primary);
            background: transparent;
            border: none;
            padding: 0 8px;
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            background: rgba(10, 17, 40, 0.98);
            backdrop-filter: blur(25px);
            padding: 20px;
            gap: 16px;
            border-top: 1px solid rgba(255,255,255,0.08);
        }

        .mobile-menu a {
            color: var(--text-primary);
            font-size: 1.1rem;
            padding: 10px 0;
        }

        /* 板块通用 */
        section {
            padding: 90px 0;
            position: relative;
        }

        .section-title {
            font-size: 2.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 50px;
            max-width: 650px;
        }

        /* Hero */
        #hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            position: relative;
            padding-top: 80px;
        }

        #hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(circle at 30% 40%, rgba(10,17,40,0.7) 0%, rgba(11,15,42,0.9) 90%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 750px;
        }

        .hero h1 {
            font-size: 3.5rem;
            font-weight: 800;
            background: linear-gradient(to right, var(--stellar-gold), #F9E076, var(--cold-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.3;
            margin-bottom: 1.5rem;
        }

        .hero .lead {
            font-size: 1.3rem;
            color: #C8D2E0;
            margin-bottom: 2.3rem;
            font-weight: 400;
        }

        .btn-glow {
            background: linear-gradient(135deg, var(--stellar-gold), #F9D56E);
            color: #0A1128;
            font-weight: 700;
            padding: 15px 40px;
            border-radius: var(--radius-btn);
            font-size: 1.15rem;
            box-shadow: 0 0 25px rgba(240, 196, 90, 0.5);
            display: inline-block;
            animation: pulse-glow 2.2s infinite;
            border: none;
        }

        .btn-outline {
            border: 1.5px solid var(--ice-cyan);
            color: var(--ice-cyan);
            padding: 13px 32px;
            border-radius: var(--radius-btn);
            font-weight: 600;
            background: transparent;
            margin-left: 20px;
        }

        .btn-outline:hover {
            background: rgba(76, 201, 240, 0.12);
            box-shadow: 0 0 16px rgba(0,229,255,0.3);
        }

        @keyframes pulse-glow {
            0% { box-shadow: 0 0 18px rgba(240,196,90,0.5); }
            50% { box-shadow: 0 0 35px rgba(240,196,90,0.8); }
            100% { box-shadow: 0 0 18px rgba(240,196,90,0.5); }
        }

        /* 玻璃卡片 */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-card);
            padding: 28px;
            transition: all var(--transition-smooth);
        }

        .glass-card:hover {
            border-color: rgba(76, 201, 240, 0.45);
            box-shadow: var(--glow-cyan);
            background: var(--glass-bg-hover);
        }

        /* 痛点卡片 */
        .pain-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 30px;
        }

        .pain-card {
            border-left: 5px solid var(--ice-cyan);
            padding-left: 22px;
        }

        .pain-card:hover {
            border-left-color: var(--stellar-gold);
        }

        /* 方案交错 */
        .solution-row {
            display: flex;
            align-items: center;
            gap: 50px;
            margin-bottom: 70px;
        }

        .solution-row.reverse {
            flex-direction: row-reverse;
        }

        .solution-text {
            flex: 1;
        }

        .solution-img {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            border: 1px solid rgba(255,255,255,0.15);
            box-shadow: 0 0 24px rgba(0,0,0,0.5);
        }

        /* 成果数据卡 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
        }

        .stat-item {
            text-align: center;
            padding: 30px 16px;
        }

        .stat-number {
            font-size: 2.8rem;
            font-weight: 700;
            color: var(--stellar-gold);
            margin-bottom: 8px;
        }

        /* 证言 */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .quote-icon {
            color: var(--stellar-gold);
            font-size: 2rem;
            margin-bottom: 15px;
            opacity: 0.9;
        }

        /* FAQ */
        .accordion {
            background: transparent;
        }

        .accordion-item {
            background: rgba(255,255,255,0.03);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: 12px;
            margin-bottom: 14px;
        }

        .accordion-title {
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            padding: 18px 24px;
            border: none;
            font-size: 1.05rem;
        }

        .accordion-title:focus {
            outline: 2px solid var(--ice-cyan);
        }

        /* CTA区块 */
        #cta {
            background: linear-gradient(135deg, #0B1424 0%, #0A1128 100%);
            text-align: center;
            border-top: 1px solid rgba(212,175,55,0.2);
        }

        /* 页脚 */
        footer {
            background: #060A1A;
            padding: 50px 0 30px;
            border-top: 1px solid rgba(255,255,255,0.06);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }

        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.8rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .hamburger { display: block; }
            .mobile-menu.active { display: flex; }
            .solution-row, .solution-row.reverse { flex-direction: column; gap: 30px; }
            .btn-outline { margin-left: 0; margin-top: 15px; display: block; width: fit-content; }
            .stats-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            section { padding: 60px 0; }
        }

        @media (max-width: 520px) {
            .hero h1 { font-size: 2.2rem; }
            .stats-grid { grid-template-columns: 1fr; }
            .pain-grid { grid-template-columns: 1fr; }
        }